jsp实现文件上传——douploadFile.jsp

<%@page import="java.io.File"%>
<%@page import="org.apache.commons.fileupload.FileItem"%>
<%@page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>
<%@page import="org.apache.commons.fileupload.FileItemFactory"%>
<%@page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
  request.setCharacterEncoding("utf-8");
  //1.判断是不是文件上传表单
  boolean ismultipart = ServletFileUpload.isMultipartContent(request);
  if (ismultipart) {
    //2.创建文件上传工厂
    FileItemFactory fac = new DiskFileItemFactory();
    //3.创建文件上传对象
    ServletFileUpload fileUpload = new ServletFileUpload(fac);
    //4.解析请求
    List<FileItem> fileItemList = fileUpload.parseRequest(request);
    //5.遍历集合，获取相应的数据
    try {
  for (FileItem item : fileItemList) {
    //判断是普通表单数据还是文件数据
    if (item.isFormField()) {
      //true为普通表单
      //获取提交过来表单name属性值
      //文件上传中不能用下列方法取数据
      //request.getParameter("userName");
          String filedName = item.getFieldName();
          if (filedName.equals("userName")) {
            //封装用户信息
            System.out.println("用户名"
                + item.getString("utf-8"));
          } else if (filedName.equals("userPwd")) {
            System.out.println("密码"
                + item.getString("utf-8"));
          }
        } else {
          //false为文件表单
          //6.获取文件名（全路径）
          String fullFileName = item.getName();
          //out.print(fullFileName);
          File file1 = new File(fullFileName);
          //只获取文件名，不包含路径
          String fileName = file1.getName();
          //7.根据虚拟路径来获取物理路径
          String uploadPath = application
              .getRealPath("upload/");
          File file2 = new File(uploadPath, fileName);
          item.write(file2);
          out.print("上传成功！");
        }//else
      }//for
    } catch (Exception ex) {
      ex.printStackTrace();
      out.print("上传失败");
    }
  }
%>